Owner's Manual - West Marine

SEA MODES PAGES AND FEATURES > MAP PAGEZooming In and Out of the MapThe map display has 28 available zoom scales ranging from 20 ftto 800 nm (20 ft to 800 mi or 5 m to 1200 km). The map scale iscontrolled by the IN and OUT keys, with the current scale displayedat the bottom right of the data window.NOTE: The scale value represents the distance from one end ofthe scale bar ( ) to the other.To select a map scale (zoom in and out):• Press the OUT key to zoom out.• Press the IN key to zoom in.The system has a built-in worldwide database, with more detailedcoverage available through the use of the BlueChart or MapSourcedata. The 276C Plus displays cartography as long as chartinformation is available for the zoom scale you have selected.Map coverage conforms to the following conditions:• Cartography is displayed when the selected zoom scale iscovered by either the internal basemap or other MapSourcedata loaded onto a data card.• When the selected zoom scale is covered by both the internaldatabase and data card map information, the cartography withthe best resolution is displayed.• When the selected zoom scale exceeds the resolution of thedata in use, “overzoom” appears below the map scale.No additional data is available• When external data (such as MapSource data) is used, “mapcard” appears below the map scale.Using detailed maps loaded on the data card• Each BlueChart map has a certain amount of “detail”associated with it. Your current location may actually becovered with three different BlueChart maps. If the chart withmost detail is disabled a message will appear to remind youto enable the BlueChart. Refer to page 80 for instructions onenabling maps.TIP: BlueChart maps are have different levels of detail. Chartswith lower numbers (20000 for example) have more detail thancharts with a larger scale (210668 for example).276C Plus Owner’s Manual 43190-00501-00_0A.indd 431/13/2005 10:43:40 AM